Wrench.



E. H. G. BRINSER.

WRENGH.

APPLICATION FILED PEB.18, 190a.

Patented Dec. 15, 1908.

MW j 6 y Wihwawo ELI H. G. BRINSER, OF ELIZABETHTOWN, PENNSYLVANIA.

WRENCH.

Specification of Letters Patent.

Application filed February 18, 1908.

Patented Dec. 15, 1908.

Serial No. 416,493.

To all whom it may concern:

Be it known that I, ELI H. G. BRINSER, a citizen of the United States,residing at Elizabethtown, in the county of Lancaster and State ofPennsylvania, have invented new and useful Improvements in Wrenches, ofwhich the following is a specification.

This invention relates to wrenches, the object of the invention being toprovide a simple and effective quick action wrench of duplex or doubleform, embodying means whereby the relatively movable jaws of the wrenchmaybe quickly adjusted with relation to each other, a further object ofthe invention being to rovide a construction which will add materiallyto the life and durability of the wrench as a whole.

With the above general object in view, the invention consists of thenovel construction, combination and arrangement of arts herein fullydescribed, illustrated and c aimed.

In the accompanying drawings, Figure 1 is a plan view of the wrenchembodying the present invention. Fi 2 is a similar view showing a slightmodification in the construction of the wrench. Fig. 3 is a crosssectionon the line 3-3 of Fig. 1. Fig. 4 is a cross-section on line 44 of Fig.2. Fig. 5 is a cross-section on line 5-5 of Fig. 2.

The wrench contemplated in this invention comprises two'parallcl andrelatively slidable shanks 1 and 2, each of which is rovided at itsopposite ends with jaws, the s ank 1 having aws 3 and 4 and the shank 2having the jaws 5 and 6. These jaws may have their working facesdisposed either at right angles to the shanks, as shown in Fig. 2, or atan oblique angle relatively thereto, as shown in Fig. 1. The paralleloverlapping and relatively sliding shanks are connected together bymeans of yokes 7 and 8 which, under the arrangement shown in Fig. 1, arein the form of endless loops or straps which closely embrace both of theshanks and are secured to one of the shanks by fasteners 9. In thearrangement shown In Fig. 2, the yokes are formed as integral parts ofone of the shanks,

- as shown in cross-section, Fig. 5, or the said yokes may be formedseparately from and united to said shanks by welding.

Between the points at which the yokes 7 and 8 are located, the innerfaces of the shanks 1 and 2 are cut away and screw threaded as shown at10, and a double pitched screw 11, or in other words, a screw embodyingright and left hand threads is inserted between the threaded inner facesof the shanks so as to simultaneously engage with both of the shanks forthe purpose of advancing or sliding the shanks longitudinally of eachother to obtain the desired adjustment between the jaws of the wrench.Furthermore, by such arrangement, the shanks and jaws are movedrelatively to each other at double the speed of an ordinary single screwwhich makes the wrench quick acting.

Under the arrangement shown in Fig. 1, the screw 11 may be placed inengagement with the threaded portions of the shanks before the yokes 7and 8 are applied and secured to one of the shanks. In the constructionshown in Fi 2, however, where the yokes are permanent y connected to oneof the shanks, it is necessary to provide other means for introducingthe adjusting screw 11. This is accomplished by cutting away a portionof the threads 10 to leave a threadless recess 12 embodying an inclinedwall, as shown in Fig. 4, the said recess 12 being of the same length asthe screw 11 so that by closing the jaws upon each other, the screw 11may be passed into the recess 12 and the threads thereof brought intoenga ement with the threads of the opposite shall 2, af ter which by aslide movement, the threads of the screw are brought into engagementwith the threads of the opposite shank 1. In order to prevent the screw11 from becoming displaced accidentally, I provide a retainer or key 13which is substantially wedgeshaped in cross-section as shown in Fig. 4,forming a shoulder which overhangs and par tially embraces the screw 11,as clearly shown in Fig. 4, the said key or retainer being held in placeby a fastener such as a screw 14.

Havin thus fully described the invention, what is c aimed as new is 1. Awrench embodying overlapping and relatively slidable shanks providedwith jaws and connected by yokes placed at a suitable distance apart,the inner faces of said shanks being cut away and facially threaded, anda double pitched screw having knurled threads interposed between andengaging the threaded portions of said shanks, substantially asdescribed.

2. A wrench comprising overlapping and relatively slidable shanksprovided with jaws, yokes connecting said shanks and spaced apart asuitable distance, the inner portions 0 said shanks being cut away andfaciall threaded between the yokes, and a rotary a justing screw havinknurled threads interposed between the t readed'portions of the shanks,one of the shanks being provided with a threadless recess providing forthe introduction and removal of said screw.

3. A wrench comprising overlapping and relatively slidable shanksprovided with jaws, yokes connected to one jaw and embracing the otherjaw and arranged at a suitable dis tance apart, the inner jaws of theshanks being cut away between the yokes and threaded, an adjusting screwinterposed between the threaded portions of the shanks, one of theshanks being provided with a threadless recess for the insertion andremoval of said 15 screw, and a retainer detachably connected to theshank having the threaded recess, said retainer acting to preventdisplacement of the screw, substantia y as described.

In testimony whereof I afiix my signature 20 in presence of twowitnesses.

ELI H. G. BRINSER.

Witnesses:

CHARLES K. MUSSER, H. CLAYTON BRUBAKER.

